swift234

Make the PlaygroundLogger be able to deal with
all the strange and wonderful new ways of printing
things.  Also addeed a testcase.

Note: this does not yet pass information about
which version (print vs. debugPrint) is called and
whether a newline is desired or not; that will be
in a future commit once the PlaygroundLogger
support for that is in a build.

<rdar://problem/20859024>


Swift SVN r28518